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Finding the Fourth Proportional to 781,686.40, 1,169,030.40 and 655,715.20

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Solution

The fourth proportional to 781,686.40, 1,169,030.40 and 655,715.20 is: 980,637.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    781,686.40 : 1,169,030.40 = 655,715.20 : x
  2. Step 2: Convert to fraction form
    781,686.40/1,169,030.40 = 655,715.20/x
  3. Step 3: Cross multiply
    781,686.40x = 1,169,030.40 × 655,715.20
  4. Step 4: Simplify right side
    781,686.40x = 766,551,002,542.08
  5. Step 5: Solve for x
    x = 766,551,002,542.08/781,686.40
  6. Step 6: Final answer
    x = 980,637.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.